It actually is window in basement office, that will have fire escape ladder leading up to grade level. No other windows or exterior doors in residential basement. H/O asked if it was code to put light by ladder. Just making sure I dont have to.
OK, it's an office building! This is the basic 'Jersey Way'... Comm bldg, means of egress, you need normal illumination. Emergency egress...depending on the Fire Official, or the Building Official...you may need 'emergency lighting' (Battery back-up) in addition to normal illumination.
Use something not in any 'code book'...common sense...ask yourself, and/or the owner if YOU had to use the exit at night...could you see??
All kidding aside, ask your local Building or Fire Inspector, but, I really doubt that they would 'fail' you IF you put it in!
The IBC building code requires illumination for the exit discharge, but not for emergency rescue openings. Your exit doors will require lighting with emergency power backup within 10 seconds. (excludes HID lighting without quick strike features) Any windows used for rescue or other openings (such as Bilco basement doors) do not require lighting.
Earl: I agree with your comments above, but I don't see anything referencing 'rescue'. He said "resi" first, then "office", and reading it again...'office in basement...HO asked if it's code'. My bad, I only saw 'office' Based on that, resi, basement window, NOT sleeping room, then it's an 'emergency escape'; nothing required by code.